The following information pertains to Mason Company for Year 2: Beginning inventory Units purchased 90 units 280 units @ @ $20 $25 Ending inventory consisted of 40 units. Mason sold 330 units at $50 each. All purchases and sales were made with cash. Operating expenses amounted to $4100 Required a. Compute the gross margin for Mason Company using the following cost flow assumptions: (1) FIFO, (2) LIFO, and (3) weighted average. b. What is the amount of net income using FIFO, LIFO, and weighted average? (Ignore income tax considerations.) c. Determine the cash flow from operating activities, using each of the three cost flow assumptions listed in Requirement a. Ignore the effect of income taxes